I saw this and thought you all may like to see it as well. Some may wish to build your own bike trailer. They could be useful for a lot of things. If you are trying to be green or just not give your whole paycheck to the gas stations, the trailers could be very handy. You could carry groceries or laundry or a host of other things on them easily. Carry Freedom has the plans for the bamboo trailer (says he will send them if you email) and they also list another links to plans for five other types of diy bike trailers. So if you are looking to build a bike trailer there are at least 6 to choose from on this site.
Bamboo bicycle Trailer DIY Project